header{
    width: 100%;
    height: 50px;
    background: orange;
    .title{
        text-align: center;
        font-size: 20px;
    }
}
main{
    width: 100%;
    height: 100%;
    background: yellow;
    .book_imgurl{
        width: 200px;
        height: 200px;
        border: 1px solid black;
    }
    .book_name,.book_cate,.book_desc{
        width: 30%;
        overflow: hidden;
        text-overflow:ellipsis;
        white-space: nowrap;
    }
    .del{
        width: 50px;
        height: 20px;
    }
}